After searching this site and this company didn't really come up much in the forums it might be a community service to mention, an FYI for everyone.
I recently went looking for some sheet music for an Irish jig I was working up. I came across https://www.elderly.com/pages/search-results?offset=24&q=accordion and discovered they also sell a few instruments if you search on accordion. Like a few very old button accordions like a 1920s Sterling Professional, a 1920s Hohner Button - nicely decorated, a 1950s Hohner Corona III R. Plus lots of sheet music and ephemera.
I recently went looking for some sheet music for an Irish jig I was working up. I came across https://www.elderly.com/pages/search-results?offset=24&q=accordion and discovered they also sell a few instruments if you search on accordion. Like a few very old button accordions like a 1920s Sterling Professional, a 1920s Hohner Button - nicely decorated, a 1950s Hohner Corona III R. Plus lots of sheet music and ephemera.